The poison Keith Ethren was inflicted with was a conditional poison.
Usually, these types of poisons hidden inside healing pills were so minute that he could easily counter it but since the poison had already to his dantian and entered his revolving core, it could be said that he ran out of options to purify the poison.
The invasion of poison was so sudden that he didn't even expect it in the first place as the pill did have medicinal properties, momentarily blinded by it.
Such a hidden mechanism in a pill can only be done by an extremely skilled at least at the level of King Grade Alchemist!
However, the pill being at Low-Level Emperor Grade meant that the Alchemist was at least at the Low-Level Emperor Grade!
'As expected of the Flowing Mist Sect! Rumors had it that it has ties with the Poison Lord Villa!'
